Supercell over Laramie
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Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of FRIDAY: APRIL 17 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.7 16.6 95 21.2 23.0 92 COTTONWOOD CREEK 7670 30.0 23.6 127 34.7 29.9 116 GRAND TARGHEE 9260 49.1 -M * 37.8 -M * GRANITE CREEK 6770 17.1 16.8 102 23.2 21.2 109 GRASSY LAKE 7265 35.2 37.0 95 37.9 38.7 98 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.4 14.1 123 GUNSIGHT PASS 9820 16.7 -M * 17.8 -M * LEWIS LAKE DIVIDE 7850 34.7 36.7 95 36.6 39.5 93 PHILLIPS BENCH 8200 31.1 30.6 102 32.9 31.3 105 SALT RIVER SUMMIT 7760 16.5 14.3 115 18.6 20.4 91 SNAKE RIVER STATION 6920 18.6 17.3 108 24.9 24.1 103 SPRING CREEK DIVIDE 9000 31.2 28.6 109 29.8 28.6 104 THUMB DIVIDE 7980 22.5 18.5 122 23.8 20.5 116 TOGWOTEE PASS 9580 30.5 26.8 114 32.2 26.9 120 TWO OCEAN PLATEAU 9240 41.3 30.7 135 32.0 30.0 107 WILLOW CREEK 8380 38.3 31.9 120 42.9 35.1 122 ----- ----- Basin wide percent of average 110 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.1 25.5 98 22.9 21.9 105 BLACK BEAR 8170 39.0 41.0 95 38.9 43.5 89 CANYON 7870 15.1 13.8 109 16.5 16.7 99 FISHER CREEK 9100 39.1 37.1 105 38.1 39.3 97 MADISON PLATEAU 7750 25.3 26.0 97 26.8 29.0 92 NORTHEAST ENTRANCE 7350 10.8 10.5 103 15.0 13.8 109 PARKER PEAK 9400 29.7 23.4 127 20.4 17.9 114 SYLVAN LAKE 8420 22.5 24.3 93 25.5 22.9 111 THUMB DIVIDE 7980 22.5 18.5 122 23.8 20.5 116 TWO OCEAN PLATEAU 9240 41.3 30.7 135 32.0 30.0 107 WHISKEY CREEK 6800 18.8 17.8 106 22.5 22.7 99 WHITE MILL 8700 26.6 26.1 102 26.3 29.2 90 WOLVERINE 7650 12.3 10.9 113 13.3 14.0 95 ----- ----- Basin wide percent of average 107 100 WIND RIVER BURROUGHS CREEK 8750 17.6 15.1 117 18.4 17.8 103 COLD SPRINGS 9630 9.6 6.9 139 12.6 12.2 103 DEER PARK 9700 14.9 17.7 84 19.9 24.3 82 HOBBS PARK 10100 16.8 16.8 100 17.0 14.8 115 LITTLE WARM 9370 13.3 12.5 106 16.4 15.0 109 SOUTH PASS 9040 15.5 17.7 88 17.5 20.5 85 ST. LAWRENCE ALT 8620 8.3 7.3 114 12.1 10.3 117 TOGWOTEE PASS 9580 30.5 26.8 114 32.2 26.9 120 TOWNSEND CREEK 8700 11.7 9.8 119 14.5 13.5 107 ----- ----- Basin wide percent of average 106 103 BIGHORN BASIN BALD MTN. 9380 20.2 22.0 92 16.8 19.2 88 BEAR TRAP MEADOW 8200 8.0 4.6 174 10.4 9.5 109 BLACKWATER 9780 28.1 27.0 104 25.3 22.8 111 BONE SPRINGS DIV 9350 18.5 17.7 105 15.7 16.4 96 EVENING STAR 9200 32.2 32.1 100 33.7 27.7 122 GRAVE SPRINGS 8550 10.3 10.8 95 11.3 11.5 98 KIRWIN 9550 15.1 12.4 122 16.2 12.6 129 MARQUETTE 8760 8.6 10.6 81 10.5 11.6 91 MIDDLE POWDER 7760 12.9 14.0 92 11.5 14.0 82 OWL CREEK 8975 6.6 5.1 129 7.7 6.9 112 POWDER RIVER PASS 9480 13.4 11.8 114 16.1 13.9 116 SHELL CREEK 9580 17.9 16.1 111 16.9 15.0 113 SYLVAN LAKE 8420 22.5 24.3 93 25.5 22.9 111 SYLVAN ROAD 7120 14.3 11.8 121 21.0 19.1 110 TIMBER CREEK 7950 5.8 5.6 104 9.6 8.7 110 YOUNTS PEAK 8350 19.7 18.1 109 17.7 17.5 101 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 28.1 27.0 104 25.3 22.8 111 EVENING STAR 9200 32.2 32.1 100 33.7 27.7 122 KIRWIN 9550 15.1 12.4 122 16.2 12.6 129 MARQUETTE 8760 8.6 10.6 81 10.5 11.6 91 SYLVAN LAKE 8420 22.5 24.3 93 25.5 22.9 111 SYLVAN ROAD 7120 14.3 11.8 121 21.0 19.1 110 YOUNTS PEAK 8350 19.7 18.1 109 17.7 17.5 101 ----- ----- Basin wide percent of average 103 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.0 4.6 174 10.4 9.5 109 BIG GOOSE 7990 11.9 12.4 96 14.7 10.7 137 BONE SPRINGS DIV 9350 18.5 17.7 105 15.7 16.4 96 BURGESS JUNCTION 7880 13.9 13.3 105 14.5 13.7 106 CLOUD PEAK RESERVOIR 9860 20.0 15.4 130 18.9 14.8 128 DOME LAKE 8880 14.6 14.0 104 17.4 14.9 117 GRAVE SPRINGS 8550 10.3 10.8 95 11.3 11.5 98 HANSEN SAWMILL 8360 7.5 6.1 123 11.4 9.4 121 MIDDLE POWDER 7760 12.9 14.0 92 11.5 14.0 82 POWDER RIVER PASS 9480 13.4 11.8 114 16.1 13.9 116 SUCKER CREEK 8880 16.6 13.5 123 18.9 15.3 124 TIE CREEK 6870 7.1 5.4 131 16.0 11.5 139 ----- ----- Basin wide percent of average 111 114 BELLE FOURCHE BLIND PARK 6890 4.7 7.5 63 15.9 12.4 128 COLE CANYON 5910 6.9 7.1 97 13.7 7.7 178 NORTH RAPID CREEK 6130 8.5 8.7 98 15.8 9.6 165 ----- ----- Basin wide percent of average 86 153 UPPER N. PLATTE RIVER COLUMBINE 9160 27.0 24.6 110 30.0 27.3 110 DIVIDE PEAK 8880 27.6 20.9 132 29.9 22.5 133 ELK RIVER 8700 23.3 19.5 119 24.4 21.4 114 JOE WRIGHT 10120 24.9 23.8 105 30.7 27.4 112 NORTH FRENCH CREEK 10130 37.7 32.8 115 35.1 27.1 130 OLD BATTLE 10000 38.4 34.8 110 43.6 37.3 117 SAGE CREEK BASIN 7850 15.4 12.1 127 16.8 13.1 128 SOUTH BRUSH CREEK 8440 13.7 13.2 104 19.6 18.2 108 TOWER 10500 48.6 49.8 98 45.0 41.9 107 WEBBER SPRINGS 9250 29.0 26.1 111 33.2 29.0 114 WILLOW CREEK PASS 9540 14.3 13.7 104 14.1 14.2 99 ----- ----- Basin wide percent of average 111 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.2 26.7 98 24.4 24.5 100 CASPER MTN. 7900 14.3 16.9 85 15.3 16.8 91 DEADMAN HILL 10220 19.4 18.4 105 19.7 18.9 104 DEER PARK 9700 14.9 17.7 84 19.9 24.3 82 LAPRELE CREEK 8375 9.3 10.1 92 14.7 14.4 102 RENO HILL 8400 17.4 15.9 109 19.1 17.5 109 ROACH 9700 18.4 18.4 100 21.2 20.5 103 SAND LAKE 10050 34.6 35.1 99 32.6 26.7 122 SOUTH PASS 9040 15.5 17.7 88 17.5 20.5 85 WINDY PEAK 7900 9.7 7.9 123 12.3 11.9 103 ----- ----- Basin wide percent of average 97 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 16.8 8.4 200 20.6 17.3 119 DIVIDE PEAK 8880 27.6 20.9 132 29.9 22.5 133 OLD BATTLE 10000 38.4 34.8 110 43.6 37.3 117 SANDSTONE RS 8150 21.7 13.3 163 23.2 20.2 115 WHISKEY PARK 8950 35.6 30.6 116 37.9 31.2 121 ----- ----- Basin wide percent of average 130 121 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.2 15.3 93 14.4 14.6 99 BLIND BULL SUM 8650 30.4 28.9 105 22.8 23.9 95 EAST RIM DIVIDE 7930 11.1 14.0 79 13.6 13.0 105 ELKHART PARK G.S. 9400 15.6 14.0 111 17.0 14.6 116 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.4 14.1 123 GUNSIGHT PASS 9820 16.7 -M * 17.8 -M * KENDALL R.S. 7740 11.3 13.5 84 15.2 15.6 97 LOOMIS PARK 8240 17.9 17.0 105 20.6 18.7 110 NEW FORK LAKE 8340 13.0 11.2 116 12.3 12.3 100 SNIDER BASIN 8060 16.0 14.9 107 16.9 17.5 97 SPRING CREEK DIVIDE 9000 31.2 28.6 109 29.8 28.6 104 TRIPLE PEAK 8500 26.8 25.9 103 29.6 26.8 110 ----- ----- Basin wide percent of average 102 105 LOWER GREEN RIVER HAMS FORK 7840 13.1 9.8 134 14.2 13.4 106 HEWINTA 9519 13.4 12.2 110 15.5 16.3 95 HICKERSON PARK 9145 7.6 8.2 93 11.4 9.0 127 HOLE-IN-ROCK 9150 7.7 7.2 107 10.9 8.6 127 INDIAN CREEK 9425 28.3 29.6 96 25.4 27.7 92 KELLEY R.S. 8180 18.4 17.1 108 20.6 22.1 93 STEEL CREEK PARK 10200 15.7 17.4 90 18.9 18.5 102 ----- ----- Basin wide percent of average 103 101 UPPER BEAR RIVER BUG LAKE 7950 21.0 21.6 97 20.4 20.9 98 HAYDEN FORK 9212 19.4 16.4 118 25.0 23.2 108 KELLEY R.S. 8180 18.4 17.1 108 20.6 22.1 93 LILY LAKE 9156 17.5 14.4 122 19.5 19.5 100 MONTE CRISTO 8960 31.4 30.5 103 30.1 28.0 108 SALT RIVER SUMMIT 7760 16.5 14.3 115 18.6 20.4 91 TRIAL LAKE 9992 28.5 26.4 108 26.8 27.3 98 ----- ----- Basin wide percent of average 109 100 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values If the Basin wide percent of average value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Average represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. Contact your state water supply staff for assistance. Reference period for average conditions is 1961-90. Provisional data, subject to revision. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.